Improvement in machines for making bolts



UNITED STATES PATENT OEETCE.

MOORE HARDAWAY, OF ST. LOUIS, MI SOURI.

IMPROVEMENT IN MACHINES FOR MAKING BOLTS.

Specification forming part of Letters Patent No. 44,623, dated October1l, 1864.

To all whom it may concern.-

Be it known that I, MOORE HARDAWAY, of the city and county of St. Louis,and State of Missouri, have invented a new and useful Improvement inMachines for Making Bolts and Rivets; and I do hereby declare that thefollowing is a full and clear description thereof,

reference being had to the accompanying drawings, and to the letters ofreference marked thereon and made to form a part of this specification.

Itis well known that the bolts and rivets made by means of horizontal orreciprocating bolt and rivet machines now in use are in many instancesveryudefective, and, in some cases, entirely unfit for use, owiu g tothe strain given to the said bolts or rivets in releasing them from thedies.

rlhe object of this invention is to overcome the aforesaid difficultyand at the same time to produce a very simple, cheap, durable, andeffective machine for making bolts and rivets; and the subjectmatter ofmy invention relates to the mode of operating the diebox, die, andplunger or header, by means of which the formed bolt may be releasedfrom the die Without strain or injury of any kind, as hereinafter setforth and represented.

In reference to the accompanying drawings, Figure 1 is a top view orplan of my improved machine. Fig. 2 is also a top view ofthe inarhinewith a portion of the die-box and die removed in order to show moreclearly the operation of the Working parts of the machine; and Fig. 3 isa vertical sectional view of the improvement, taken through the red linea: x, Fig. 1.

A represents a platform or bed upon which the machinery is arranged tooperate.

b represents the diebox, which will be constructed in a strong,substantial manner, and adjusted upon the bed A, so as to be movablelongitudinally. This box b is made with a recess in its front end whichis adapted to receive a die, as c, and the said die may be rinly andproperly secured by means of screws (not shown) working through the boxb.

d d are clamps, one of which, d, may be in a fixed position, while theother, d', is movable, and constructed and arranged to operate by meansof suitable devices, as, for instance, the cam e of shaft E, bar e',projection e, and proper springs, (not sbown,) in such manner that thesaid clamps d d may be adapted, at certain proper periods in theoperation of the machine, to grasp the blank bolt and secure the samerigidly during the process of heading, after which the movable clamp dwill bc retracted so as to release the formed bolt and allow the same tofall from the machine. The said clamps may be provided with cutters, asg g, by means of which the blank bolts may be severed from long rodssuitable for the object desired.

The normal position of the said box b will be that in which the face ofits contained die will bear against the said clamps, and it will besecured in or returned to this position, as the case maybe, by means ofasuitable spring. The said box b, with its contained die, may bewithdrawn or retracted from its said normal position atcertain suitableperiods, hereinafter described, by means of a bent lever, f', which ispivoted to the bed A at j". The said lever is attached to the box b andmay be actuated by means of a cam, h, upon shaft E, in such manner as tooperate the said box b, so as to release the formed bolt from the die atproper periods.

K represents the plunger or header, which will be adapted in form andsize to iit and Work Within the die that may be employed, and it will beoperated, with reference to its forward motion, by means of which thehead of the bolt may be formed, by a suitable cam, as p, upon shaft E,and it may be retracted when released from said cani by means of asuitable spring, as it. (Seenin Fig. 3.) All the working parts of theaforesaid machine may be formed of suitable metal.

Having thus described the construction of my invention, l will proceedto explain the operation of the same.

llhe position of the Working parts of the inachine being the saine asshown in Fig. l, and the shaft E being made to rotate the rod from whichthe bolts or rivets are to be made, being rst properly heated, may befed to themachiiie. The end upon which the head is to be formed beinginserted within the die c, the cani e will be made to operate the clampd through the medium of bar e in such manner that the blank bolt may begrasped firmly by the said clamps d d. At this period in the operationof the machine the cam p is made to force the header 7c forward into thedie c against the blank bolt, thereby upsetting` the saine in suchmanner as to form the head of the bolt to correspond with the internalconiguration of the die. At this period in the operation, when the headof the bolt is completely formed, the cam l1, is made to actuate thebent lever fin such manner as to retract the diebox b with itscontaineddie, and, the movable clamp-die d being` also retracted bymeans of a spring or other suitable device, the formed bolt is, withoutstrain or injury, and in a perfect condition, releasvd from the machine,the header 7s remaining stationary until the bolt is entirely free fromboth dies, y

Fig. 1 represents the working parts of the machine at that period in theoperation at which the blank bolt may be fed to the die, Fig. 2, that atwhich the bolt is fully formed, and Fig. 3 that at which the formed boltis discharged from the die and allowed to fall from the machine.

Headers and dies of different sizes and forms will bc employed inaccordance with the nature of the result desired.

I do not claim or confine myselfl to the precise construction andarrangement of the devices by means of which the within-describedoperation of the said die-box and header and movable clamp-die may beaccomplished as I am fully aware thatthe saine result may be effected invarious ways without departing` from the spirit ot' my invention 5 but,

Having thus described the construction and operation of myinventionsufficiently to enable persons skilled in the art to which it appertainsto make and use the same, what I claim as new, and desire to secure byLetters Patent,

The combination. of the die-box b, header 7c, and clamp-dies d d, in abolt or rivet-heading` machine, when operating` in the manner and forthe purpose herein set forth.

In testimony of which invention I have M. HARDAWAY.

Witnesses H. E. GLrF'roN, HIRAM BANKE.

